DIDDY BABY MAMA MOVES OUT

AFTER 10 long years of sticking by Sean Combs, the music impresario’s baby mama and longtime girlfriend, Kim Porter, has finally had enough.

Sources inside Combs’ camp told Page Six that Porter moved out of his apartment here and she isn’t going back.

“Kim is in Louisiana filming a movie right now, and when it’s done she’s moving to L.A.,” the insider said.

Porter has already bought a posh pad in Beverly Hills for her and her four children – three of whom, Christian, 10, and twins D’Lila and Jessie, 7 months, are Diddy’s.

“She is focusing on her career as a model and actress and raising her children,” our source said. “They are the best of friends, but they just can’t be together right now.”

This doesn’t mean Combs and Porter won’t ever be together again. They split for several years when he was dating Jennifer Lopez, but as soon as he and J.Lo broke up, Combs went right back to Porter.

Rumors of a rift between the two started circulating earlier this year when, right after the December birth of the twins, Combs stayed out almost every night till the wee hours of the morning partying with Sienna Miller. The two once stayed out so late partying at her hotel room that they even caught breakfast together in the morning.

The friendship between Combs and Miller was rekindled last weekend when he went to London to perform in the Princess Diana Memorial Concert at Wembley Arena.

According to Britain’s Daily Mirror, Combs went to the concert after-party at a club called Paper, but “didn’t look too happy to be there . . . until [Miller] arrived . . . For seemingly the first time all night, he started to enjoy himself . . . he ordered six burly bouncers to form a ring around the couple. And one unlucky reveler who accidentally strayed too close to the pair at Paper . . . was manhandled out of the way by their heavies.”

Combs and Miller were so engrossed in each other, they “failed to notice staff accidentally smash several champagne flutes at the table,” the London paper said.

Porter didn’t return calls, and a rep for Combs said, “There is no truth to this.”